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Monday, 15 June 2026
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Physics Past Questions and Answers

Topic: Dimensions

Jamb Physics Questions - Dimensions

Question 16:
The voltage of the domestic electric supply is represented by the equation V = 311 sin314.2t. Determine the frequency of the a.c. supply [\(\pi\) = 3.142]
  • A 50.0Hz
  • B 100.0Hz
  • C 311.0Hz
  • D 314.2Hz
View Answer & Explanation
Question 17:
The physical quantity that has the same dimensions as impulse is
  • A Energy
  • B Momentum
  • C Surface tension
  • D Pressure
View Answer & Explanation
Question 18:
In a nuclear fusion experiment, the loss of mass amounts to 1.0 x 10-6kg. The amount of energy obtained from the fusion is
  • A 3.0 x 10<sup style='font-size: smaller;'>-4</sup>J
  • B 3.0 x 10<sup style='font-size: smaller;'>-1</sup>J
  • C 9.0 x 10<sup style='font-size: smaller;'>4</sup>J
  • D 9.0 x 10<sup style='font-size: smaller;'>10</sup>J
View Answer & Explanation
Question 19:
If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is
  • A Doubled
  • B Reduced to a quarter
  • C Reduced by half
  • D Constant
View Answer & Explanation
Question 20:
A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is
  • A 4.0 x 10<sup style='font-size: smaller;'>2</sup>N
  • B 2.0 x 10<sup style='font-size: smaller;'>3</sup>N
  • C 4.0 x 10<sup style='font-size: smaller;'>3</sup>N
  • D 4.0 x 10<sup style='font-size: smaller;'>4</sup>N
View Answer & Explanation